US6100666A - Method for calibrating rechargeable battery capacity - Google Patents

Method for calibrating rechargeable battery capacity Download PDF

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Publication number
US6100666A
US6100666A US09/333,262 US33326299A US6100666A US 6100666 A US6100666 A US 6100666A US 33326299 A US33326299 A US 33326299A US 6100666 A US6100666 A US 6100666A
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United States
Prior art keywords
rechargeable battery
capacity
determining
reached
battery
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US09/333,262
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English (en)
Inventor
Chang-Hyun Ryu
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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Assigned to SAMSUNG ELECTRONICS CO., LTD. reassignment SAMSUNG ELECTRONICS CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RYU, CHANG-HYUN
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
    • G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates generally to battery-powered electronic devices and, more particularly, to a method of calibrating capacities of rechargeable batteries.
  • Rechargeable batteries are presently used in many portable electronic devices, such as computers, camcorders, and mobile phones. Such devices are also capable of utilizing alternating current (AC) power. Battery power is utilized when AC power is not convenient or is not available.
  • AC alternating current
  • NiCad nickel-cadmium
  • NiMH nickel metal hydride
  • lithium ion batteries are used.
  • a portable computer system is powered by either a smart rechargeable battery pack or by alternating current (AC) through an AC-to-DC adapter.
  • smart batteries typically include memory storage devices, and some smart battery packs include a microcontroller.
  • Some smart batteries incorporate "fuel gauge” functions, by which the charge levels of the batteries can be indicated.
  • An example of rechargeable batteries with such fuel gauge functions is described in U.S. Pat. No. 5,315,228.
  • a rechargeable battery measures its discharge current, estimates its self-discharge, and predicts its remaining capacity.
  • the typical fuel gauge approach simply uses a recent value for average current consumption to calculate the remaining run time of the system. This may provide inaccurate information as to the remaining capacity of the battery. If, for example, the remaining run time of the system reported from the fuel gauge is shorter than its actual run time, then the user cannot consume its full battery capacity. Conversely, if the remaining run time of the system reported from the fuel gauge is longer than its actual run time, the portable computer system will be shut down before the calculated run time.
  • battery calibration Prior to calibration, a battery must be fully charged. The fully charged battery is fully discharged for an exact learning of the battery capacity.
  • the calibration of a battery takes a long time (i.e., about 2-3 hours) because of its long discharge time. Considering total time of the calibrating process, the discharging process occupies the majority of the total time. In order to reduce the calibration time of a battery, its faster discharge is demanded.
  • an object of the present invention to provide a faster calibration method for rechargeable batteries used for portable electronic systems.
  • FIG. 1 is a schematic perspective view illustrating a portable computer system
  • FIG. 2 is a block diagram illustrating a portable computer system powered from a smart battery according to an embodiment of the present invention.
  • FIG. 3A and FIG. 3B are flowcharts illustrating a method for calibrating a rechargeable battery according to the present invention.
  • FIG. 1 is a schematic perspective view of a portable computer system 10.
  • the computer system 10 is powered by either a smart rechargeable battery pack 20 or an AC-to-DC adapter 30.
  • Smart batteries normally include memory storage devices which contain information regarding their characteristics and types.
  • Some smart battery packs include a microcontroller which allows communication, by way of a bi-directional communication line, with the battery charger regarding various battery characteristics.
  • Such smart batteries are disclosed in, for example, "Smart battery Specifications" by Duracell Inc. and Intel Corporation.
  • FIG. 2 is a block diagram which illustrates a portable computer system powered from a smart battery according to an embodiment of the present invention.
  • the portable computer system comprises an AC-to-DC adapter 100, a smart rechargeable battery 110 including an embedded microcontroller (not shown) and embedded storage devices (not shown), and a system power supply 120 which generates system power by using power from the AC-to-DC adapter 100 or the battery 110.
  • the system power supply 120 is coupled to a DC/AC inverter 130 and a microcomputer 140, respectively.
  • the microcomputer 140 is coupled to the DC/AC inverter 130, a cooling fan 150, and a system bus 250.
  • a central processing unit (CPU) 180, a basic input/output system (BIOS) 190, one or more system memories 200, and a video controller 170 are commonly coupled to the system bus 250.
  • a flat panel display 160 such as a liquid crystal display (LCD) panel, is coupled between the DC/AC inverter 130 and the video controller 170.
  • a hard disk drive (HDD) 230 and a floppy disk drive (FDD) 240 are coupled to the system bus 250 through an HDD controller 210 and an FDD controller 220, respectively.
  • the BIOS 190 contains control logic for calibrating the capacity of the smart battery 110 according to the present invention.
  • a calibration mode for a calibrating process is selected in a system setup (usually called CMOS setup) program.
  • the microcomputer 140 controls charging/discharging operations of the rechargeable battery 110 by generating a plurality of control signals.
  • the microcomputer 140 sets the portable computer system to consume maximum power for fast discharge of the battery 110.
  • the system memories 200 are recursively accessed, the LCD panel 160 is driven to have a maximum brightness, and the cooling fan 150 and motors of the HDD drive 230 and FDD drive 240 are driven at their maximum speed by the control signals from the microcomputer 140.
  • discharging of the smart battery is performed rapidly during calibration.
  • the calibrating process can be performed rapidly.
  • calibration of the capacity of the smart battery 110 is carried out after the battery 110 has been fully charged. Further, the calibration is executed when removal of the AC-to-DC adapter 100 from the system is ensured. Accordingly, although a user selects the battery calibration mode, the mode will not be entered unless the battery 110 is fully charged and the AC-to-DC adapter 100 is removed. This calibration process will be described in detail below with reference to figures of accompanying drawings.
  • FIG. 3A and FIG. 3B are flowcharts illustrating a calibration method of a smart rechargeable battery according to the present invention. The steps of the flowcharts are performed by the microcomputer 140 and the smart battery 110.
  • step S210 a determination is made as to whether the smart battery calibration mode is selected by use of the system setup program. If so, control flow proceeds to the next step S220, wherein it is asked whether the smart battery 110 is fully charged. If so, flow proceeds to step S240, but if not, flow proceeds to step S230 wherein the smart battery 110 is fully charged, and then to step S240.
  • step S240 a message for removing the AC-to-DC adapter 100 is displayed on the LCD panel 160, and then flow advances to step S250. In step S250, a determination is made as to whether the AC-to-DC adapter 100 is removed. If so, flow continues to step S260.
  • step S260 the power management function is disabled for the beginning of the actual calibration process.
  • step S270 the microcomputer 140 sets the portable computer system to its maximum power consumption mode.
  • step S280 the smart battery 110 begins to be discharged.
  • step S290 a determination is made, at predetermined time intervals, as to whether the smart battery is discharged to a battery capacity learning level (that is, to a predetermined level where battery capacity can be learned). If so, the flow continues to step S300, wherein the capacity of the smart battery 110 is learned so as to obtain its correct capacity value.
  • step S3 10 the microcomputer 140 sets the portable computer system to its minimum power consumption mode.
  • step S320 the power management function is enabled and the calibrating process is terminated.
  • the disparity between the predicted run time and the actual run time is calibrated through the foregoing calibration process of the smart battery 110. Furthermore, calibration is performed rapidly by the fast discharge of the smart battery with maximum power consumption.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
US09/333,262 1998-06-15 1999-06-15 Method for calibrating rechargeable battery capacity Expired - Lifetime US6100666A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR98-22436 1998-06-15
KR1019980022436A KR100333771B1 (ko) 1998-06-15 1998-06-15 충전가능한배터리의용량캘리브레이팅방법

Publications (1)

Publication Number Publication Date
US6100666A true US6100666A (en) 2000-08-08

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Country Status (6)

Country Link
US (1) US6100666A (fr)
EP (1) EP0965906A3 (fr)
JP (1) JP2000060020A (fr)
KR (1) KR100333771B1 (fr)
CN (1) CN1138985C (fr)
TW (1) TW432767B (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6329794B1 (en) * 2000-05-22 2001-12-11 Hitachi, Ltd. Information processing device and method for controlling power consumption thereof
US20020035703A1 (en) * 2000-09-18 2002-03-21 Yosuke Konaka Electronic apparatus and processing ability alteration instruction apparatus
US20030188210A1 (en) * 2002-04-02 2003-10-02 Takahiro Nakazato Power consumption control method and information processing device
US20040220758A1 (en) * 2002-12-29 2004-11-04 Evgenij Barsoukov Circuit and method for measurement of battery capacity fade
US20060075509A1 (en) * 2003-05-22 2006-04-06 Jakob Kishon Data storage protection device
US20100191490A1 (en) * 2007-07-09 2010-07-29 Koninklijke Philips Electronics N.V. Method and device for determining the state of charge of a battery
US20110089905A1 (en) * 2009-10-16 2011-04-21 Junya Yano Power supply device
US20110154005A1 (en) * 2009-12-18 2011-06-23 Landry John A Automated battery calibration
US20130113435A1 (en) * 2010-07-13 2013-05-09 Tomtom International B.V. System and Method for Extending the Physical Life of Batteries in Mobile Devices
CN104597404A (zh) * 2014-12-19 2015-05-06 深圳市科陆电子科技股份有限公司 电池实际容量、soc以及soh的自动标定方法
US9222984B2 (en) 2010-08-05 2015-12-29 Panasonic Intellectual Property Management Co., Ltd. Power supplying system for supplying power to a load disposed in a facility
CN107132865A (zh) * 2017-04-07 2017-09-05 上海蔚来汽车有限公司 储能单元的主动冷却功率标定方法及系统

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6630814B2 (en) 2000-12-19 2003-10-07 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for calibrating a rechargeable battery
KR20040013608A (ko) * 2002-08-07 2004-02-14 삼성전자주식회사 휴대용 컴퓨터 및 그 제어방법
TW556421B (en) 2002-08-15 2003-10-01 Htc Corp Circuit and operating method for integrated interface of PDA and wireless communication system
US9306243B2 (en) 2011-01-24 2016-04-05 International Business Machines Corporation Optimizing battery usage
JPWO2012133274A1 (ja) 2011-03-30 2014-07-28 三洋電機株式会社 蓄電システム及び移動体
EP2717422A4 (fr) * 2011-06-03 2014-11-12 Sanyo Electric Co Système de commande de cellule assemblée et système d'alimentation électrique le comprenant
CN103499792B (zh) * 2013-07-18 2016-02-24 浙江工业大学 电动汽车动力电池集群可用容量的预测方法

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US3969667A (en) * 1972-08-23 1976-07-13 The United States Of America As Represented By The Secretary Of The Navy Device for determining the state of charge in batteries
US4151454A (en) * 1976-09-20 1979-04-24 Kabushiki Kaisha Aichi Denkikosakusho Remaining capacity detector of a battery
US4207611A (en) * 1978-12-18 1980-06-10 Ford Motor Company Apparatus and method for calibrated testing of a vehicle electrical system
US4290002A (en) * 1979-06-04 1981-09-15 Gould Inc. Method and apparatus for controlling battery recharging
US4912392A (en) * 1986-10-18 1990-03-27 Husky Computer Limited Battery charge state monitor
US5140269A (en) * 1990-09-10 1992-08-18 Champlin Keith S Electronic tester for assessing battery/cell capacity
US5268845A (en) * 1991-02-14 1993-12-07 Dell Corporate Services Corp. Method for detecting low battery state without precise calibration
US5315228A (en) * 1992-01-24 1994-05-24 Compaq Computer Corp. Battery charge monitor and fuel gauge
US5363689A (en) * 1992-09-11 1994-11-15 Intertech Development Company Calibration device for leak detecting instruments
US5472056A (en) * 1993-09-08 1995-12-05 Case Corporation Control system for agricultural vehicle and calibration method for such control systems
US5563496A (en) * 1990-12-11 1996-10-08 Span, Inc. Battery monitoring and charging control unit
US5596260A (en) * 1994-05-13 1997-01-21 Apple Computer, Inc. Apparatus and method for determining a charge of a battery

Patent Citations (12)

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Publication number Priority date Publication date Assignee Title
US3969667A (en) * 1972-08-23 1976-07-13 The United States Of America As Represented By The Secretary Of The Navy Device for determining the state of charge in batteries
US4151454A (en) * 1976-09-20 1979-04-24 Kabushiki Kaisha Aichi Denkikosakusho Remaining capacity detector of a battery
US4207611A (en) * 1978-12-18 1980-06-10 Ford Motor Company Apparatus and method for calibrated testing of a vehicle electrical system
US4290002A (en) * 1979-06-04 1981-09-15 Gould Inc. Method and apparatus for controlling battery recharging
US4912392A (en) * 1986-10-18 1990-03-27 Husky Computer Limited Battery charge state monitor
US5140269A (en) * 1990-09-10 1992-08-18 Champlin Keith S Electronic tester for assessing battery/cell capacity
US5563496A (en) * 1990-12-11 1996-10-08 Span, Inc. Battery monitoring and charging control unit
US5268845A (en) * 1991-02-14 1993-12-07 Dell Corporate Services Corp. Method for detecting low battery state without precise calibration
US5315228A (en) * 1992-01-24 1994-05-24 Compaq Computer Corp. Battery charge monitor and fuel gauge
US5363689A (en) * 1992-09-11 1994-11-15 Intertech Development Company Calibration device for leak detecting instruments
US5472056A (en) * 1993-09-08 1995-12-05 Case Corporation Control system for agricultural vehicle and calibration method for such control systems
US5596260A (en) * 1994-05-13 1997-01-21 Apple Computer, Inc. Apparatus and method for determining a charge of a battery

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6329794B1 (en) * 2000-05-22 2001-12-11 Hitachi, Ltd. Information processing device and method for controlling power consumption thereof
US20020035703A1 (en) * 2000-09-18 2002-03-21 Yosuke Konaka Electronic apparatus and processing ability alteration instruction apparatus
US20030188210A1 (en) * 2002-04-02 2003-10-02 Takahiro Nakazato Power consumption control method and information processing device
US7178043B2 (en) * 2002-04-02 2007-02-13 Kabushiki Kaisha Toshiba Power consumption control method and information processing device
US20040220758A1 (en) * 2002-12-29 2004-11-04 Evgenij Barsoukov Circuit and method for measurement of battery capacity fade
US6892148B2 (en) 2002-12-29 2005-05-10 Texas Instruments Incorporated Circuit and method for measurement of battery capacity fade
US20060075509A1 (en) * 2003-05-22 2006-04-06 Jakob Kishon Data storage protection device
US20100191490A1 (en) * 2007-07-09 2010-07-29 Koninklijke Philips Electronics N.V. Method and device for determining the state of charge of a battery
US20110089905A1 (en) * 2009-10-16 2011-04-21 Junya Yano Power supply device
US8436585B2 (en) * 2009-10-16 2013-05-07 Sanyo Electric Co., Ltd. Power supply device
US20110154005A1 (en) * 2009-12-18 2011-06-23 Landry John A Automated battery calibration
US8443212B2 (en) * 2009-12-18 2013-05-14 Hewlett-Packard Development Company, L.P. Automated battery calibration
US20130113435A1 (en) * 2010-07-13 2013-05-09 Tomtom International B.V. System and Method for Extending the Physical Life of Batteries in Mobile Devices
US9620978B2 (en) * 2010-07-13 2017-04-11 Tomtom International B.V. System and method for extending the physical life of batteries in mobile devices
US9222984B2 (en) 2010-08-05 2015-12-29 Panasonic Intellectual Property Management Co., Ltd. Power supplying system for supplying power to a load disposed in a facility
CN104597404A (zh) * 2014-12-19 2015-05-06 深圳市科陆电子科技股份有限公司 电池实际容量、soc以及soh的自动标定方法
CN107132865A (zh) * 2017-04-07 2017-09-05 上海蔚来汽车有限公司 储能单元的主动冷却功率标定方法及系统

Also Published As

Publication number Publication date
JP2000060020A (ja) 2000-02-25
CN1138985C (zh) 2004-02-18
TW432767B (en) 2001-05-01
EP0965906A3 (fr) 2000-11-02
KR100333771B1 (ko) 2002-08-27
KR20000001949A (ko) 2000-01-15
CN1239226A (zh) 1999-12-22
EP0965906A2 (fr) 1999-12-22

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